415 S 42nd St, Boulder, CO 80305 Property Records

Boulder County property record for 415 S 42nd St, Boulder, CO 80305

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.75 ba · 2,162 sqft · built 1956
Lot Size	0.175 acres (7,630 sqft)
Owner	Company Name on Record
Last Sale	$1,149,000 (Oct 2024)
Tax Bill	$6,822 (2025)
Deeds & Mortgages	Sep 2023 Sale Sep 2023 Sale & Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`1577-05-4-24-024`

Property Details

APN / Parcel Number

Primary APN	`1577-05-4-24-024`
Alternative APNs	`R0014139` `0014139`

Interior

Bedrooms	4 Beds
Full Baths	2.75 Baths
Half Baths	1 Half Bath
Total Rooms	8 Rooms
Stories	1 Story
Building Area	2,162 sqft Living Area
Gross Area	2,700 sqft
1st Floor Area	1,150 sqft
Basement Area	1,350 sqft
Finished Basement	1,012 sqft
Unfinished Basement	338 sqft

Exterior

Year Built	Built 1956
Effective Year Built	Effective 2021
Architectural Style	Ranch
Exterior Material	Brick Veneer
Construction Type	Masonry / Concrete Block
Lot Area	7,630 sqft (0.175 acres)
Garage Type	Attached
Garage Area	200 sqft
Parking Spaces	1 Parking Space
Patio Area	243 sqft

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0014139
Street Address	415 S 42ND ST
City	BOULDER
State	CO
Zip	80305-5455
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 24 BLK 7 MARTIN ACRES 2
Legal Subdivision	MARTIN ACRES 2 - BO
Legal Block	7
Legal Lot Number	24
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	3
Census Block	3008
Census Tract	12507

Owner

Source: Boulder County records, as of September 18, 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	Company Name on Record
Mailing Address	415 S 42ND ST, BOULDER, CO 80305-5455
Owner Type	Company
Vesting	Limited Liability Partnership

Deeds, Mortgages & Sale History

Date	Document
Sep 12, 2023	Special Warranty Deed, Transfer LAND TITLE GUARANTY COMPANY IN, LAND TITLE GUARANTEE CO
Sep 13, 2023	Special Warranty Deed, Transfer · Commercial Mortgage MERCHANTS MORTGAGE & TRUST CORP
Jul 18, 2023	Deed of Trust, Mortgage FIRSTBANK

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Oct 21, 2024 · Amount on Record
Deed Sale	Oct 21, 2024 · Amount on Record
Prior Sale	Sep 13, 2023 · Amount on Record
Deed Document Number	20244064237
Transfer Doc	0001355097
Record Updated	Oct 29, 2026

September 2023: Special Warranty Deed, Transfer

Document Type	Special Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Sep 12, 2023
Property Address	415 S 42ND ST, BOULDER, CO 80305-5455
Document Number	0004021454
Instrument Date	Sep 11, 2023
Instrument	4021454
Transaction Type	Transfer
Record Updated	Oct 23, 2023
Title Company	LAND TITLE GUARANTY COMPANY IN, LAND TITLE GUARANTEE CO

Transaction

Amount	Amount Recorded
Tax	$77.15
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	415 S 42ND ST, BOULDER, CO 80305-5455

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	6819 CATTAILS DR, WELLINGTON, CO 80549-2183

September 2023: Special Warranty Deed, Transfer

Document Type	Special Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Sep 13, 2023
Property Address	415 S 42ND ST, BOULDER, CO 80305-5455
Document Number	0004021521
Instrument Date	Sep 11, 2023
Instrument	4021521
Transaction Type	Transfer
Record Updated	Oct 23, 2023
Title Company	LAND TITLE GUARANTY COMPANY IN, LAND TITLE GUARANTEE CO

Transaction

Amount	Amount Recorded
Loan-to-Value (LTV)	LTV on Record
Tax	$78.50
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	415 S 42ND ST, BOULDER, CO 80305-5455

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	1942 BROADWAY STE 314C, 314C, BOULDER, CO 80302-5233

Mortgage

Document Number	0004021522
Date	Sep 13, 2023
Instrument	4021522

Lender

Name	MERCHANTS MORTGAGE & TRUST CORP
Type	Mortgage Company

Agreement

Type	Commercial Mortgage
Amount	Amount Recorded

July 2023: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	415 S 42ND ST, BOULDER, CO 80305-5455
Transaction Type	Mortgage
Record Updated	Aug 9, 2023

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	2329 PINE ST, BOULDER, CO 80302-4608

Mortgage

Document Number	0004014789
Date	Jul 18, 2023
Instrument	4014789

Lender

Name	FIRSTBANK
Type	Bank
Address	DENVER, CO 80215

Agreement

Amount	Amount Recorded
Term	5 Months
Due	Dec 25, 2023

Interest

Rate	9.25%

Tax Assessment & Valuation

Source: Boulder County assessment roll, as of September 18, 2026

Property Jurisdictions

Type	Name
State	Colorado
County	Boulder County
Municipality	Boulder City
Unified School District	Boulder Valley School District RE-2 (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$72,168 (+2.07%) Land $34,428 Building $37,740	$1,131,300 (-) Land $576,300 Building $555,000
2025	$6,822.00 (+46.96%)	$70,707 (+23.1%) Land $36,019 Building $34,688	$1,131,300 (+31.96%) Land $576,300 Building $555,000
2023	$4,642.00 (+8.94%)	$57,439 (+27.4%) Land $42,210 Building $15,229	$857,300 (+32.16%) Land $630,000 Building $227,300
2022	$4,261.00	$45,085 Land $31,310 Building $13,775	$648,700 Land $450,500 Building $198,200

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

Source: FEMA National Flood Hazard Layer, effective October 14, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	6 in force
Nearby Flood Claims	7 (1979–2022)
Claims Outside the SFHA	5 of 7
Most Recent Claim	Jul 2022 · rainfall accumulation
Claims by Event	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 5 claims

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Low lower than 80% of the US · lower than 91% of Colorado
Wildfire Likelihood	0.01% annual chance
Exposure	None beyond ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	CITY OF BOULDER serves 166,080 people · EPA ID CO0107152
Water Source	Surface water
Last State Inspection	Sep 2024
Lead	2 ppb (2023–2025) action level 15 ppb

Violations Reported to EPA

Water Quality	Haloacetic acids resolved · Jul 2017
Treatment and Procedure	None last 10 years
Monitoring and Reporting	1 last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 678 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Ayva Networks Fixed Wireless	2,500 / 2,500
CenturyLink Fiber · DSL in parts of the area	2,000 / 1,000
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
LiveWireNet Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20

May also be available: AT&T.

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